| 摘要 |
<p>Disclosed is a displacement detector including light generation source for generating a light, a scale to be irradiated by the generated light and displaceable relative to the irradiated light, first detection device having a photo-sensing element for detecting a light transmitted through the scale for detecting displacement information of the scale, a mark having a focusing function formed integrally with the scale, and second detection device having a photo-sensing element for sensing the light focused by the mark for detecting a reference position of the scale. <IMAGE></p> |
